<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script src="../js/2.js"></script>
		<script>
			document.write("<h1>javascript是一个解释性语言</h1>");
			alert("welcome to js");
		</script>
	</head>
	<body>
	</body>
</html>